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library IEEE;( j) v6 z, \$ N: O2 i. T$ v
use IEEE.STD_LOGIC_1164.ALL;7 |" w4 [8 h' @# P
use IEEE.STD_LOGIC_ARITH.ALL;
2 @/ W6 _+ P7 b( L) {use IEEE.STD_LOGIC_UNSIGNED.ALL;
$ l, E+ ~1 ^+ j' S* I
8 @0 X+ a( E2 ]' y( N8 a$ g2 k---- Uncomment the following library declaration if instantiating
* F0 n# D0 }7 p; i' A+ g& V( A---- any Xilinx primitives in this code.
[+ K* _* ~9 Q2 l--library UNISIM;
; t) v5 S3 N5 y* s--use UNISIM.VComponents.all;
1 ~1 ]+ V' g% N! }entity musicmusic is2 y1 b. k+ J! X
port( inclk : in std_logic; --Clock Signal' y; c8 R' Z/ G
spk : buffer std_logic; --speaker driver, K2 X& _/ w+ m
reset :in std_logic;5 K: V! M9 B7 R+ L) i9 n
L1,L2 : in std_logic);
; @/ ^( V- V+ O/ a4 l; bend musicmusic ;
# b: X& ?5 ]9 y( H4 T' J4 I--------------------------------------------------------------------------------------
- z4 w+ K3 | I1 w9 T S" U8 t7 Jarchitecture behave of musicmusic is+ Y. D2 b1 h. G
signal tone : std_logic_vector(10 downto 0);
9 c! J- Z" r" ]! l. P signal tone_count : std_logic_vector(10 downto 0);
7 |3 Z; {- T' d signal tone_index : integer range 0 to 19;
. J G" J1 J* c6 g* |) V& ? signal clk10_count : std_logic_vector(17 downto 0); 4 t! h& ]& k( C. t
--signal time : integer range 0 to 500;+ o4 F5 M: o, g6 ]& t% ~0 w
signal clk : std_logic;
5 L6 j0 |: D: S+ G signal clk10 : std_logic; ! I6 T4 R$ W+ R4 o5 Q9 T6 i
signal se1 : integer range 0 to 63; ! h! n7 b8 ?& K ?6 ]
signal se2 : integer range 0 to 160;
& h3 F. U4 z: h/ q) q" F2 }4 B0 O signal se3 : integer range 0 to 35;
$ G; K! U% e0 `5 q3 r; S+ V4 w------------------------------------------------------------------------------------- " I. `0 N' {" c: s [3 M
begin7 d1 D8 Z5 q' x, V7 ^3 e# T
PROCESS(inclk) --generate 2Mhz clock signal
- |! P: A$ l/ G Y H. d) X8 H3 @ variable cnt1 : INTEGER RANGE 0 TO 39;
8 r+ U, A: c" A3 Y5 u BEGIN
8 f7 ]& ^ Q) r4 n# ~ IF inclk='1' AND inclk'event THEN
9 l) n5 n9 v( I' j ] IF cnt1=39 THEN cnt1:=0; 4 E* n" H! y9 k$ ?
ELSE ' f9 _# S- u' I, x' x ?
IF cnt1<30 THEN clk<='1';
' F) l+ f, j' [7 l- j' j$ e/ F ELSE clk<='0';
" Y) V1 c* J9 F8 S+ o END IF; 3 x' h9 l. B! j4 |5 {
cnt1:=cnt1+1; 0 a, Y7 F1 e, ~/ ~. ~ @
END IF;
1 K+ m8 f3 h O: Q q3 H2 s END IF; " x5 t2 L! e1 z7 @2 U
END PROCESS; 9 C9 _1 @3 L/ g
------------------------------------------------------------------------------------- * E) r+ B8 l; P# H. [% U
process(clk) --generate 10hz clock signal
. [) l! z& G \/ i begin8 D" L. [1 Y1 x A3 l
if(clk'event and clk='1') then$ ~5 {' z7 O7 S5 O
clk10_count<=clk10_count+1;7 T, T6 a2 l- j' k/ E! T
if(clk10_count=16#3ff#) then* j* y$ X4 y& ]* l
clk10<=not clk10;
/ G% _ z5 Q# G end if;
* ?& N, L, k$ Y0 ` end if;: e: L/ q! P' B% J" P
end process; # N# L+ D( g6 |; |0 s0 |4 T' @
------------------------------------------------------------------------------------- 1 y0 w" i% O% Z
process(clk10) & t4 |: E# e% }& }) L& h
begin( A, `& D8 s+ v# D3 S+ J. G& z0 s+ |
if reset='0' then
/ ~2 J1 Z! [1 b$ c+ g: N se1<=0;
6 M/ T7 Q( J# c se2<=0;
0 C4 e, t+ }, v! e; [0 S4 I se3<=0;
' c3 F6 {. n+ U$ O8 \5 v tone_index<=0;
* A5 J* _5 K; E; I elsif(clk10'event and clk10='1') then
6 ?' f; H ^$ ^/ t: W! F; j* E2 Z) M----------------------------------------------------------------------
1 Y9 }- h: m, v k, J# r6 l6 N process(tone_index)% [- C a' ~! d) {
begin
( f( q) S: @# a4 b$ R4 L6 \ case tone_index is
' c5 B: ?; j* \5 i) r+ J when 0=>tone<="11111111111"; --no output7 z6 q, x& I2 Q$ l! _3 h
when 1=>tone<="01100000101"; --773--1$ {" [! Z# w0 e5 g0 D
when 2=>tone<="01110010000"; --912--29 j) D" y$ L3 M
when 3=>tone<="10000001100"; --1036--3
# V( o d% c0 _# {. ]# D. ~ when 4=>tone<="10000111111"; --1087--4
2 x. V+ L4 v. U6 K3 h. l, E; R1 J. A when 5=>tone<="10010101101"; --1197--5
8 c- V* _( t2 c2 R7 g when 6=>tone<="10100001010"; --1290--6& a6 p% j+ v9 z+ Z3 ~
when 7=>tone<="10101011100"; --1372--79 Z1 ?& P P/ {5 o7 F O" ]) j& Q
when 8=>tone<="10110000010"; --1410--High 1
4 [+ g. q, Z4 V3 r when 9=>tone<="10111001000"; --1480--High 2
F0 U% K: J& ~ when 10=>tone<="11000000110"; --1542--High 3/ X% G+ D" K5 H' N H$ ^6 `4 e
when 12=>tone<="11000110000"; --1584--High 4 l- O. ?5 {+ g, K! Y
when 13=>tone<="11010000100"; --1668--High 55 n2 J5 m5 L$ Z: @! E
when 16=>tone<="10001111111"; --1151--High #4
7 h) c4 F6 _# d when 17=>tone<="10011110100"; --1766--High #5 - C5 b# m9 |6 I" y* |' g# ^
when 18=>tone<="10111100110"; --1510--High #2
/ t& Z7 V& ?& w6 ?5 V* D+ m+ Z+ X when others=>tone<="11111111111"; --others:no output
* _1 {$ R6 e9 n5 `* t
C, |9 Q: X) J7 e* q end case;1 Y" w. \% x3 t/ F6 d7 f
end process; * C( v* z1 R9 o" D Z
P4 ~2 D0 W; a/ Y) P
-------------------------------------------------------------------------------------
W) |1 N' F0 l+ t" Q* K/ w process(clk) --control the frequence of the speaker
2 i: k' s7 K! Z! M) K5 z- H begin
$ e' P( ]# g6 }& Y6 Q if(clk'event and clk='1') then2 u4 E s0 O' B$ @- b I
if(tone_count=16#7ff#) then
3 Q' a) M8 d! S5 o) n tone_count<=tone;/ j+ @+ W. k: I% _8 W
if(tone<2047) then
B9 n6 s7 ~! w9 P- A4 z spk<=not spk;
" G8 O% j. \# k' q2 u7 R" w& } end if;! L0 D2 W! W- D
else
8 R) c. w' l: t, y6 r tone_count<=tone_count+1;
; z) Q& @! I4 B! W# d end if;
% `# g2 y5 i4 n, e S! s end if;& m# F2 c. p6 c, e, v& y. ]
end process;
% \+ T1 z! g5 P ^! N. x# L9 l* C- _$ [
n$ L0 r1 n& k; a% p: ]end behave;
/ _( {* X* f' Y- b9 k; l1 k) J" p/ ~
中 do 的773頻率 是如何算出來的??4 r. V8 T5 \7 E; i0 I; X& _
那是用多少HZ去算的??
) R" a' }) O% F% Z. s希望有公式給個解答 |
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